Glass-cutting apparatus.



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- Patented May I, I900 J. H. SENDEN &. G. E. SMITH. GLASS CUTTINGAPPARATUS.

(Application filed Aug. 9, 1899.).

. (No Model.)

STATES PATENT 4.1)

JULIUS H. SENDEN AND GEORGE E. SMITH, or DES MOlNES, Iowa.

cLAss-cu'rrmc APPARATus.

SPECIFICATION forming part of Letters Patent No. 648,535, dated May 1,1900.

Application filed August 9, 1899.

To all whom it may con'ccrrt:

Be it known that we, JULIUS H. SENDEN and GEORGE E. SMITH, citizens ofthe United States, residing at Des Moines, in the county of Polk andState of Iowa, have invented a new and useful Glass-Cutting Apparatus,of which the following is a specification.

The object of this invention is to provide a board of simple, strong,and durable construction upon which unskilled persons may cut glass withgreat ease and accuracy and by the use of which the breakage incident tocutting glass will be minimized.

Our invention consists in certain details in the construction of theboard whereby warping is prevented and the scale at its .sides and endskept of a uniform length unaffected by moisture or differenttemperatures and, further, in the construction, arrangement, andcombination therewith of the straight-edges and deducting-strip, ashereinafter more fully set forth, pointed out in the claim, andillustrated in the accompanying drawings, in which- Figure 1 shows aperspective View of the complete apparatus, and Fig. 2 shows atransverse sectional view of the board with one of the straight-edges inposition thereon.

Referring to the accompanying drawings, the reference-numeral 10 is usedto indicate the side and end strips, which are substantially L-shaped incross-section, with a groove 11 on the inner edge thereof, and theirends are beveled and fitted together. On the top edge of each is aseries of vertical holes 12, for purposes hereinafter made clear, and onthe top of the horizontal part of each strip a scale 13 is fixed. Withinthe rectangular frame thus formed is a second frame 14:, the pieces ofwhich are tongued and grooved to fit to each other and to the said endand side pieces. The two rectangular frames are also preferably heldtogether by means of the screws 15.

The central portion of the board is filled by means of the narrow strips16 to form the panel, preferably tongued and grooved and so positionedas to be capable of the ordinary contraction and expansion incident towooden boards of this size without afiectin g the outer frame bearingthe scale.

Two straight-edges are provided, the one Serial No. 726 ,654. (ll'omodel) being designed for use when cutting transversely of the board andthe other when cutting longitudinally. They are similar in con structionsave for length, and hence will not be separately described.

The numeral 17is used to indicate the body portion, which has onebeveled edge 18. The under surface of its ends is-cut away at 19, and ametal plate 20, having a downwardly projecting pin 21, is securedthereto with its lower face a considerable distance above that of thestrip. The said pins and the'holes 12 are so'arranged with relation tothe scales and the straight-edge that when the pins are in two holes thebeveled edge of the straightedge will be directly over one of theinchmarks of the scale.- By having the under surface of thestraight-edge projecting below the surface of the end plates thestraight edge may rest upon the surface of a pane of glass, andobviously this may be done no matter what the thickness of the glass maybe.

This feature of having the straight-edge close to the glass will preventinaccuracies and Variations in cutting glass, which would occur if thestraight-edge were some distance from the glass by reason of theoperator moving his hand to the right or left when drawing theglass-cutter toward him, even though the instrument were held againstthe straight edge all the time.

The numeral 22 is used to indicate a deducting'strip. This is madeL-shaped in cross section, and the dimensions of its edges 23 and 24 arepreferably one-eighth and onefourth of an inch, respectively, and thesides three-eighths and one-half of an inch. In use this strip is madeto cooperate with the scales at the sides of the board in promotingaccuracy and speed in cutting glass, as follows: On said scales theinches only are marked, and hence if it is desired to cut a glass eightand five-eighths inches in length we place the three-eighths-inch sideof the deducting-strip against the left-hand side of the board. Then byresting the glass against said strip and placing the straight-edge atthe nine-inch mark the glass may be out to the desired length. Itfrequently happens that in cutting glass by the common method with ascale on which the small fractions of an inch are marked the operator isunable to see clearly An apparatus for use in glass-cutting; com- 7prising the board having a frame L-shaped in cross-section along thesides and ends and provided with holes inits top, a scale on the topface of the horizontal part of' each side and end piece of said frame, acentral part to the board composed of boards longitudinally grooved andfitted together to allow for contraction and expansion without changingthe scales, one or more straight-edges having their end portions cutaway and pins therein and an L-shaped deducting-strip having sides ofdifferent thickness, substantially as and for the purposes stated.

JULIUS H. SENDEN. GEORGE E. SMITH. Witnesses:

J As. BARELS, THOMAS G. ORWIG.

